Finding the Fourth Proportional to 1,987.31, 2,967.58 and 1,622.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.31 : 2,967.58 = 1,622.81 : x
2. Step 2: Convert to fraction form
   1,987.31/2,967.58 = 1,622.81/x
3. Step 3: Cross multiply
   1,987.31x = 2,967.58 × 1,622.81
4. Step 4: Simplify right side
   1,987.31x = 4,815,818.50
5. Step 5: Solve for x
   x = 4,815,818.50/1,987.31
6. Step 6: Final answer
   x = 2,423.28